Keithley 4200-SCS Reference Manual page 983

Model 4200-SCS Reference Manual
Table 12-8 (cont.)
Inputs for VdId_Pulse_DC_Family_pulseiv (cont.)
Input
VgStop
VgNumSteps
Vg_off
VdStart
VdStop
VdStep
PulseWidth
PulsePeriod
AverageNum
GateScpRange
DrainScpRange
GateSMURange
4200-901-01 Rev. S / May 2017
Section 12: Pulse Projects for Models 4200-PIV-A and 4200-PIV-Q
Type Description
double The final step value for Vg. For DC only sweeps, VgStop must be
between -200 V to +200 V dependent on the type of SMU and the
current requirements of the DUT. For pulse and pulse and DC
Sweeps, VgStop must be between -5 V to +5 V.
double The number of steps for Vg (Max = 10).
double The DC bias applied by the GateSMU to put device in the OFF state.
Set to 0 V for enhancement FETs (may be non-zero for depletion
FETs).
double The starting sweep value for Vd. For DC only sweeps, VdStart must
be between -200 V to +200 V dependent on the type of SMU and the
current requirements of the DUT.
double The final sweep value for Vd. For DC only sweeps, VdStop must be
between -200 V to +200 V dependent on the type of SMU and the
current requirements of the DUT.
double The number of steps for the Vd sweep (Max = 10000).
double The Vgs pulse width (PW). The PW can be 40 ns to 250 ns (10 ns
resolution). Pulses wider than 250 ns will begin to be attenuated by
the coupling capacitor in the Remote Bias Tee (4205-RBT).
double The pulse period for the Vgs pulse, from 100 µs to 1 s (10 ns
resolution). The period must be set so that the Duty Cycle (DC) is no
more than 0.1 %. To calculate the period, multiply the largest pulse
width (PW) by 1000. Example: PW = 150 ns, so Period = 150 µs.
int The number of pulses to average at each step of the sweep. For
best low signal performance, set AverageNum = 0 for Adaptive
Filtering.
double The voltage measure range for the scope channel measuring the
Gate. Use 0 for scope autoranging or specify a value for a fixed
range. Valid voltages are 0.050, 0.1, 0.2, 0.5, 1, 2, 5, 10. Ranges are
Vpp. For example, the 0.5 range covers -250 to +250 mV.
double The voltage measure range for the scope channel measuring the
Drain. Use 0 for scope autoranging, or specify a voltage value for a
fixed range, where V = I * 50
0.5, 1, 2, 5, 10. These ranges are Vpp. For example, the 0.5 range
covers -250 to +250 mV.
int The current measurement range to be used for the SMU on the DUT
Gate terminal. Values correspond to the list below. Limited Auto
means that the value given is the minimum measurement range
used, with automatic ranging for larger currents.
1 Full Auto
2 Limited Auto 10 pA
3 Limited Auto 100 pA
4 Limited Auto 1 nA
5 Limited Auto 10 nA
6 Limited Auto 100 nA
7 Limited Auto 1 uA
8 Limited Auto 10 uA
9 Limited Auto 100 uA
10 Limited Auto 1 mA
11 Limited Auto 10 mA
12 Limited Auto 100 mA
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Ω
. Valid voltages are 0.050, 0.1, 0.2,
12-23